The Large Hadron Collider will destroy the world: Less than 1 in 1 million
Agreed. And if we're proven wrong, I promise to buy everybody on this list who publicly disagrees a beer, or else an unreasonably expensive mineral water as a means of signaling the equivalent level of deference.
It might be worth noting that even if the LHC does do something that causes the world to be destroyed, it might be a rather slow destruction that could take a few years to complete, so that's not entirely an empty promise...
As we did last year, use this thread to make predictions for the next year and next decade, with probabilities attached when practical.
Happy New Year, Less Wrong!